Paint For Window Sills -

Property Owners, Maintenance Professionals, and Painting Contractors Date: April 14, 2026 Subject: Comprehensive analysis of coating systems for interior and exterior window sills.

| Feature | Interior Sills | Exterior Sills | | :--- | :--- | :--- | | | Scrubbing, condensation, UV through glass | Rain, snow, direct sun (UV), -30°C to +60°C cycles | | Sheen Required | Semi-gloss or high-gloss (ease of cleaning) | Semi-gloss or satin (gloss highlights surface defects) | | VOC Constraint | Low-VOC (≤50 g/L) required | No constraint (exterior ventilation) | | Mold Resistance | Beneficial (mildewcide additive) | Mandatory (fungicidal additive) | | Recommended Product | Waterborne alkyd (e.g., Benjamin Moore Advance) | 100% acrylic exterior trim paint (e.g., Sherwin-Williams Duration) | paint for window sills